src/soc/samsung/exynos5420/bootblock.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/cache.h>
   4 #include <bootblock_common.h>
   5 #include <soc/clk.h>
   6 #include <soc/wakeup.h>
   7 #include <soc/cpu.h>
   8
   9 /* convenient shorthand (in MB) */
  10 #define SRAM_START      (EXYNOS5_SRAM_BASE >> 20)
  11 #define SRAM_SIZE       1
  12 #define SRAM_END        (SRAM_START + SRAM_SIZE)        /* plus one... */
  13
  14 void bootblock_soc_init(void)
  15 {
  16         if (get_wakeup_state() == WAKEUP_DIRECT) {
  17                 wakeup();
  18                 /* Never returns. */
  19         }
  20
  21         /* set up dcache and MMU */
  22         mmu_init();
  23         mmu_disable_range(0, SRAM_START);
  24         mmu_config_range(SRAM_START, SRAM_SIZE, DCACHE_WRITEBACK);
  25         mmu_config_range(SRAM_END, 4096 - SRAM_END, DCACHE_OFF);
  26         dcache_mmu_enable();
  27
  28         /* For most ARM systems, we have to initialize firmware media source
  29          * (ex, SPI, SD/MMC, or eMMC) now; but for Exynos platform, that is
  30          * already handled by iROM so there's no need to setup again.
  31          */
  32 }